Device for shaping and truing grinding rolls



DEVICE FOR SHAPING AND TRUING GRINDING ROLLS Original Filed April 30,1930 JNVENTOQ:

flerbprl- Lindner Patented Apr. 25, 1933 UNITED STATES PATENTOFFICEHERBERT LINIDNER, or BERLIN, GERMANY v DEVICE FOR SHAPING AND T'RUING-GRINDING ROLLS Original application filed April 30, 1930, Serial No.448,658, and in GermanyOctober 17, 1927. Divided and this applicationfiled June 1, 1932. Serial This invention relates to a truing tool for.use in. truing the ribs of such a grinding roller as is shown anddescribed in my copending application for patent filed April 30, 1930and bearing Serial Number 448,658, the present application being adivision thereof.

One important object ofthe invent on is to provide an improved generalconstruction oftruing tool for this purpose.

A second important object of the invention is to provide an improvedtruing tool especially designed to true sharply serrated grinding rolls.

- j With the aboveand other objects in view,

the invention consists ingeneral of certain novel details ofconstruction and combinations of parts hereinafterjfully described,illustrated in the accompanying drawing and specifically claimed. 7

In the accompanying drawing, like characters of reference indicate likeparts in the several views, and I t Figure 1 is atopplan view of theimproved roll truing device.

Figure 2 is a section on the line EF of Figurel. C Y 7 Figure 3 is afront elevation of the left hand portion of Figure 1.

Figure 4 is a section on the line G-H of Figure 1 and Figure 5 is anenlarged detail section on the line J-K of Figure 1. I

In the present embodimentof the invention, a frame 13 adapted to bemounted on a suitablebase is provided with a dove-tail guide 14 whereona saddle piece15 is arranged to slide. The saddle piece forms a guidefor a tool or cutter holder 16 which moves in a direction at rightangles to the saddle piece.- Thelatter is controlled by a screw spindle17 which is held in a bearing bracket 18 on the frame 13 and is fittedat one end with a star wheel 19. Adriving shaft 21 arranged parallel tothe screw spindle is mounted in bearing brackets and fitted with apulley wheel 22 through the medium of which it receives continuousmotion. A disc 23 mounted on the driving shaft carries a tappet 24 whichcooperates,.-=

with the star wheel 19 for imparting intermittent rotation to the screwspindle. Slidably feathered on the shaft 21 is a cam 25 against whichthe holder 16 bears under the influence of a tension spring 31, thelatter being accommodated in a recess 29 in the holder and attached atone end to a'lug 30 which rises from the saddle. piece 15 and at itsother end to the holder 16. A pair of hooked arms 27 on the saddle pieceembraces the shaft 21,.one at each side of the cam 25 and causesthelatter to follow the movements of the tool holder. A shaping andtruing tool in the form of a diamond 28 is secured to the front end ofthe tool holder.

The cam 25 may be shaped so as to eifect a slow return movement of thetoolholder, and the lateral feeding ofthe blank may be carried outduring such return movement for forming the sloping backs of the ribs.In this case a pointed diamond without any definite shape may be usedfor forming the r1 s. I

Figure 1 shows a roller blank 32 arranged in position to be shaped bymeans of the tool A 28, the blank being supportedand rotated by suitablemeans (not shown). In the arrangement shown, about one-half ofthe'carn25 is cylindrical and allows the spring 31 to maintain theshaping tool out of contact with the roller 32' while the tool holderand the tool are shifted by means of thetappet 24 and the star wheel 19through therspace of one rib. After the shifting of the tool holdor arising cam face 34 causes the tool to be 7 substantially thrust forwardinto contact with the roller, whereupon a cam face 35 gradually advancesthe tool until a groove of the required depth is formed; From 36 the camface is again substantially cylindrical and maintains the tool in thegroove until a delongitudinally of scending face 37 causes it to besuddenly retracted from the roller so as to allow a fresh lateraladvance of the tool holder. Subsequent truing of the grinding roller iseffected in the same manner.

The frame 13 may be secured to the supporting base by means of clampscrews, and may be adapted to be adjusted about one of the screws 38,the remaining screws 40 being assed through elongated slots 39 whichwill allow the adjustment. By this arrangement the device can be set forshaping and truing conical as well as cylindrical grinding rollers.

I claim:

1. A device for shaping and truing grind-' ing rolls comprising a frame,a saddle mounted on the frame to move transversely thereof, a toolholder mounted on the saddle to move longitudinally of the frame, adrive shaft extending transversely of the frame and provided withdriving means, a cam mounted on the drive shaft and engaging the toolholder tomo-ve the same in one direction, a spring constantly holdingthe tool holder against the cam, and means to feed the saddletransversely of the frame.

, 2. A device for shaping and truing grindmg rolls comprising a frame, asaddle mounted on the frame to move transversely thereof,

a tool holder mounted on the saddle to move the frame, a drive shaftextending transversely of the frame and provided with driving means, acam mounted on the drive shaft and engaging the tool holder to move thesame in one direction, a spring constantly holding the tool holderagainst the cam, means to feed the saddle transversely of the frame, andan operative connection between said shaft and means arranged to causeoperation of the means once during each revolution of the shaft. a

3. A devicefor shaping and truing grinding rolls comprising a frame, asaddle mounted on the frame to movetransversely thereof, a. tool holdermounted on the saddle tomove longitudinally of the frame, a drive shaftextending transversely of the frame and provided with driving means, acam mounted on the drive shaft and engaging the tool-holder to movethesame in one direction, a spring constantly holding the tool holderagainst the cam, means to feed the saddle transversely of the frame,spline means connecting the cam and shaft to permit movement of the camalong the shaft, and means carried. by the saddle and engaging the camto move the latter as the saddle moves.

4. A device for shaping and truing grinding rolls comprising a frame, asaddle mounted on the frame to move transversely thereof, a tool holdermounted on the saddle to move longitudinally of the frame, a drive shaftextending transversely of the frame and provided with driving means, acam mounted on the drive shaft and engaging the tool hold- .means toactuate the or to move the same in one direction, a spring constantlyholding the tool holder against the cam, means to feed the saddletransversely of the frame, an operative connection between said shaftand means arranged to cause operation of the means once during eachrevolution of the shaft, spline means connecting the cam and shaft topermit movement of the cam along the shaft, and means carried by thesaddle and engaging the cam to move the latter as the saddle moves,

5. A device for shaping and truing grinding r'olls comprising a frame, asaddle mounted on the frame to move transversely thereof,a tool holdermounted on the saddle to move longitudinally of the frame, a driveshaft-extending transversely of the frame and provided with drivingmeans, a cam mounted on the drive shaft and engaging the tool holder tomove the same in one direction, a spring constantly holding the toolholder against the cam, a feed screw having screw engagement with thesaddle, a bracket on the frame supporting the screw for rotaandcooperating with the;

tive movement screw to prevent longitudinal movement thereof, and meansto actuate the screw as the shaft revolves. v a

6. A device for shaping and truing grinding rolls comprising a frame, asaddle mounted on the frame to move transversely thereof, a tool holdermounted on the saddle to move longitudinally of the frame, a drive shaftextending transversely of the frame and provided with driving means, acam mounted on the drive shaft and engaging the tool holder to move thesame in one direction, a spring constantly holding thetool holderagainst the cam, a feed screw having screw engagement with the saddle, abracket on the frame supporting the. screw for rotative movement andcooperating with the screw to prevent longitudinal movement thereof, adisk fixed on the shaft, a star wheel fixed on the screw, and a tappetprojecting from the disk and engaging the arms of the star wheel insuccession as the shaft revolves.

7. A device for shaping and'truing grinding rolls comprising a frame, asaddle mounted on the frame to move transversely thereof, a tool holdermounted on the saddle. to move longitudinally of the frame, a driveshaft extending transversely of the frame and provided with drivingmeans, a cam mounted on the drive shaft and engagingthe tool holder tomove the same in one direction, a spring constantly holding the toolholder against the cam, a feed screw having screw engagement with thesaddle, a bracket onthe frame supporting the screw for rotative movementand cooperating with the screw to prevent longitudinal movement thereof,

screw as the shaft revolves, spline means connecting the cam and shaftto permit movement of the cam along the shaft, and means carried by thesaddle and engaging the cam to move the latter as the saddle moves.

8. A device for shaping and truing grinding rolls comprising a frame, asaddle mounted on the frame to move transversely thereof, a tool holdermounted on the saddle to move longitudinally of the frame, a drive shaftextending transversely of the frame and provided with driving means, acam mounted on the drive shaft and engaging the tool holder to move thesame in one direction, a spring constantly holding the tool holderagainst the cam, a feed screw having screw engagement with the saddle, abracket on the frame supporting the screw for rotative movement andcooperating with the screw to prevent longitudinal movement thereof, adisk fixed on the shaft, a star wheel fixed on the screw, a tappetprojecting from the disk and engaging the arms of the star wheel insuccession as the shaft revolves, spline means connecting the cam andshaft to permit movement of the cam along the shaft, and means carriedby the saddle and engaging the cam to move the latter as the saddlemoves.

HERBERT LINDNER.

